From the article and comments I don't understand - are they talking about backup (copy of data) or backup system (nuke your primary system, failover to backup system and just keep working) ?
I think it is a SYSTEM
> It has a backup, which officials switched to when problems with the main system emerged, according to the source.
> Officials ultimately found a corrupt file in the main NOTAM system, the source told CNN. A corrupt file was also found in the backup system.
Perhaps the backup system is just using data from main system which currently is compatible but won't be in the near future?
Still there should be data copy somewhere, right (with corrupt data...)?
I am starting to wonder if this "backup" is an online log replica of the production system.
Failover doesn't work out in the situation where you are replicating trash. A "reboot" from an actual backup/snapshot would be required if you ate a bad log stream.
I think it is a SYSTEM
> It has a backup, which officials switched to when problems with the main system emerged, according to the source.
> Officials ultimately found a corrupt file in the main NOTAM system, the source told CNN. A corrupt file was also found in the backup system.
Perhaps the backup system is just using data from main system which currently is compatible but won't be in the near future?
Still there should be data copy somewhere, right (with corrupt data...)?